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[Launchpad Bug Tracker <1937319@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package casper - 1.472

---------------
casper (1.472) kinetic; urgency=medium

  * Support iso-url= on the kernel command line as a synonym for url=, to
    help avoid the conflict with cloud-init over that argument. (LP: #1937319)

 -- Michael Hudson-Doyle <michael.hudson@xxxxxxxxxx>  Fri, 03 Jun 2022
11:25:33 +1200

** Changed in: casper (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1937319

Title:
  namespace collision on url kernel arg results in downloading iso
  multiple times

Status in cloud-init:
  Triaged
Status in casper package in Ubuntu:
  Fix Released

Bug description:
  As listed at https://discourse.ubuntu.com/t/netbooting-the-live-
  server-installer/14510/135

  When attempting a netboot, we can end up in a situation where cloud-
  init downloads a full iso, only to decide that the first few bytes
  aren't the expected header and to ignore it.

  I suggest an enhancement where a small amount of data is downloaded at
  first, we check this data for the required #cloud-config, and then use
  that info to decide to continue to download the file or not.

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